Improved stump-extractor



tant

@sind n. J. MCCEEA or BETHLEHEM, NEW JERSEY.

Leners Patent No. 86,990, dated Femina/ry 16, 1869.

IMPROVE!) STUIVIP-EXTRACTOR.

The Schedule referred to in these Letters Patent and making part of themme.

To all whom 'it may concern Be it known that I, A. J. MCGEEA, ofBethlehem, in the county of Hunterdon, and State of New Jersey, haveinvented a new and improved Stump-Extractor; and I do hereby declareAthat the following is a full, clear, and exact description thereof,which will enable others skilled in the art to make and use ,the saine,

reference being had to the accompanying drawings,

forming part of this specification.

This invention relates to machines for extracting stumps from theground, hoisting stones, or other heavy bodies, moving buildings, andfor allsimilar purposes; and

It consistsin the application of the mechanical princple termed thewheel and axle, the wheel being a ratchet-wheel, revolved byratchet-pawl and lever, with adjustable fulcrum, arranged as will behereinafter described.

Figure 1 is a vertical section of the machine, through theline x x ofiig. 2.

Figure 2 is a plan or top View.

Similar letters of reference indicate like parts.

A is the axle, which is supported on a properly-constructed frame,marked` B.

C is the wheel, provided with ratchet-teeth, as seen in the drawing.

D D represents the lever, upon one or both, sides of the machine.

E E represent ratchet-pawls, which are attached to the levers.

As these machines have hitherto been constructed, the lever has beenapplied directly to the wheel, or if a purchase has been obtained, andthe wheel revolved by the increased power thus obtained, the fulcrum'ofthe lever has been the axle of the machine; consequently the amount ofpower, or the purchase of the lever, depended upon the diameter of theVwheel.

The main feature of my invention is, removing the fulcrum of the leverfrom the axle to any point between the axle and the resisting weight orperiphery of the wheel, so that the power of' the lever may be increasedin proportion to the amount of such re.

moval.

The wheel is made to revolve within a frame, or

yoke, G, which is connected with and supported by the frame at each end.

The sides of Ithis frame, G, are somewhat arching,

`so that 'they pass over the axle, as seen in iig. 1.

H represents brackets or supports, for the fulcrumpins i, of the lever,upon the outside of one branch or leg of the lever ou the outside, whilethe inner end of the pin is supported by the frame or yoke G.

It will be seen that the lever forms a crotch,V the branches or legs ofwhich pass inward toward the axle, on each side ofthe wheel, throughwhich legs the pins t' pass, as seen in the, drawing.

J represents theselegs.

The pawls E are attached to the crotchesof the levers, by pins or bolts,as seen at k.

n this examplel of my invention, two levers, one on each side of thewheel, are arranged so that the inachine may be operated from both sidessimultaneously.

The ratehets are so arranged that one lever, D', operates the wheel bybearing down, and the other, by lifting up.

Tothe lever D, on the under side, there is attached by a hinge, aholding-pawl, E', which engages with the ratchet-teeth of the wheel, andprevents the wheel from turning back in the operation of lifting. rlhispawl is held to the wheel by a spiral spring, marked L.

m represents a rope or chain, which is attached to the axle and to theobject to be raised or moved.

The fnlorum of the lever may be placed at any point desired between theaxle and the periphery of the wheel, and voi" course the power appliedwill depend upon the purchase thus obtained, and the length of thelevers under a given force.

Having thus described my invention,

I claim as new, and desire to secure by Letters Patentl Astump-extractor, consisting of the parts G and H, levers D D', pawls Eand E', spring L, and frame, 'arranged substantially as described.

The above specification of my invention signed by me, this 13th day ofAugust, 1868.

Witnesses: A. J. MCUREA. FRANK BLoo'KLEY,

ALEx.1F. Renners.

